While music is as old as humanity, conducting as a profession is relatively new. Although a nineteenth-century model has served as the template for the training of conductors, many undergraduate conducting students will spend their teaching careers working with inexperienced and/or amateur musicians. Additionally, the size of many ensembles in schools today more closely approximates the chamber music of the sixteenth, seventeenth, and eighteenth centuries than the large groups of the Romantic era. Today's conductors should be prepared to serve as teacher, musical collaborator, and pedagogue. The author explains how the Spherical Rehearsal Rubric can be used by teachers for their rehearsal techniques. (Contains 2 figures.)